peters



2 Sheets-Shet 2.

Patented Oct. 26,

Elevator.

O. R. OTIS.

(No Model.)

N- PETERS, PHOTO-LITHOGRAFNER WASH NGTON D c UNITE CHARLES R. OTIS, OF YONKERS, NEIV YORK.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 233,794, dated October 26, 1880.

Application filed July 28, 1880.

10 all whom "it may concern.-

Be it known that I, CHARLES It. OTIS, of Yonkers, \Vestchester county, New York, have invented an Improvement in Elevators, of which the following is a specification.

The object of my invention is to facilitate the operation of that class of elevators espeeially intended for private dwellings, where the doors are generally locked except when the cage is opposite the same, and where it is necessary to stop and start the cage from outside the well, and often from a floor above or below that where the cage is situated.

In the drawings forming part of this specification, Figure I is an elevation of part of a dwelling facing the doors, and showing an arrangement illustrating my invention. Fig. 2 is a transverse sectional elevation, looking in the direction of the arrow, Fig. 1. Fig. 3 is a section illustrating the mode of securing the doors of. the well. Fig.4 is an enlarged sec-u tional view of the valve arrangements illustrated in Figs. 1 and 2. Fig. 5 is a section of another valve arrangement; Fig. 6, a view illustrating a valve-rope-tightenin g device, and Fig. 7 illustrating another form of such device.

As is well known, it is not expedient to permit the doors closing access to the well of an elevator to be opened from the outside. They are therefore so constructed and provided with catches so arranged that the attendant in the cage can manipulate them; but in elevators intended for private houses, where the use is too infrequent to permit the employment of a regular attendant, the cage must be locked in the well and other means devised for securing and nnfastening the doors, while itis also necessary to provide means whereby a person upon any landing may start and stop the cage, whatever may be its positions locked within the well.

To effect the first result I provide the cage A, combined with any suitable operating de vices, with the bearing a, and in each door B, I make a notch, b, within which fits the end of a spring-catch, c, suitably arranged within a recess below the door, and extending outward so as to be struck by the bearing a, in which case it will be depressed, and then permit the movement of the door, which therefore can (No model.)

only be opened when the cage is in position to permit the entrance or egr ss of passengers.

I do not confine myself 0 the construction of lock or catch shown, s it is obvious that there are many well-kn wn forms of detents which may be arranged to be automatically operated by contact with the cage or its attachments.

In order that the cage, when thus locked within the well, may be stopped or started, I provide the engine, whatever may be its charaeter, with a supplemental stopping or starting valve appliance and operating cable, rope, or ropes, and arrange at each landing appliances whereby said rope may be operated by a party on the outside of the door atsuch landing, so as to start the cage and bring it in a position opposite the door, and there automaticall y unlock the latter, when an entrance may be effected to the cage, which may thereafter be operated by means of the usual valveworking appliances from within the same- In Figs. 1 and 2 I have shown the cage in connection with an ordinary Baldwin hydraulic elevator, having the usual cylinder D, piston, rod, and appliances connecting the same to the cage, and provided with the usual valve-chest E and valve circulating-pipes F G, discharge-pipe H, and inlet-pipe I. The construction and operation of these parts are so well known that detailed description is not necessary. In connection with this arrangement I propose to form a communication between the circulating-pipes F G-for instance, by means of a pipe, J, Figs. 1 and 4, placing a valve, 00, therein, and a supplementary communication between the cylinder and discharge-pipe H, as by means of a pipe, L, in which communication '1 place a valve y, levers c (1, extending from the respective valve-stems and properly weighted or controlled by springs, being connected to ropes or cables M, secured at the upper ends at any suitable point above the upper floor.

By means of appliances for tightening the 5 ton and lowering the cage. In either case the valve in the main chest E remains stationary and the valves .10 y automatically close when pressure is removed from the operating appliances, so that there is no interference with the action of the main valve after access is bad to the cage.

A single operating-cable may be employed for operating a single valve constructed to permit the water to be discharged from below the piston or circulate from the top to the bottom, as in Fig. 5, where the usual valve-chest E and its valve are supplemented by a second chest, E, having a similar valve and discharge, the pipe G extending to both chests and the pipe F communicating with both. In such case the supplementary valve should be weighted or controlled by a spring, so as to automatically close the discharge and permit communication between the main chest and cylinder when the supplemental valve is not being operated.

Any other suitable form and arrangement of valve or valves may be employed.

To tighten the valve rope or ropes from any desired point, the same may be carried past two rollers or bearings, m m, opposite which is arranged a plunger, a, carrying a roller, 8, which, when forced by the inward movement of the plungers between the rollers m m, will taut the rope and operate the valve. Such device is arranged at each floor at a point where the plunger may be readily pressed inward with but little exertion by the operator, and each plunger may have a head or disk suitably marked to indicate the movement resulting fiom its action. A like result maybe secured by passing the valve-rope M between rollers m m, carried by a frame, R, which may be oscillated by the movement of the plunger, as shown in Fig. 7, to bend and shorten the rope.

A preferable construction is a lever, n arranged to bear at the inner end against a knot in the rope, the outer end extending beyond the wall at an accessible point, as shown in Fig. 2.

I claim 1. In an elevator, the combination of the cage and operating apparatus, one or more supplementary valves, cable extending therefrom to the upper floor, and devices arranged at each landing to operate the valve from the outside of the wall, substantially as set forth.

2. The combination, in an elevator, of the cylinder, piston, cage and connections, and a main and a supplementary valve apparatus, the latter constructed, substantially as specified, to automatically assume a position leaving an open communication between the mainvalve case and the cylinder, for the purpose set forth.

3. An elevator provided with duplicate valve appliances and operating devices, one arranged to be operated from within the cageand the other to be operated from different landings outside the well, substantially as set forth.

4. The combination, with the cage-elevating apparatus and duplicate valve appliances, substantially as set forth, of a detent arranged to lock the well doors from the inside and a projection in the cage arranged to automatically operate the detents and release the doors, as specified.

5. The combination, with the valve-cord extending from the valve to the highest floor, of a series of operating devices, arranged one at each landing, substantially as set forth.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

. CHAS. 1t. OTIS.

Witnesses:

J OHN McMAHon, FRANK VARIAN. 

